#include <stdio.h>
#include <unistd.h>

// this one is safe according to http://www.unixwiz.net/techtips/chroot-practices.html
void chroot_safe1(){
  chdir("/tmp");
  if (chroot("/tmp") != 0) {
    perror("chroot /tmp");
  }
  setuid(1077);
}

void chroot_safe2(){
  chdir("/tmp");
  if (chroot("/tmp") != 0) {
    perror("chroot /tmp");
  }
  setresuid(1077);
}

void chroot_safe3(){
  chdir("/tmp");
  if (chroot("/tmp") != 0) {
    perror("chroot /tmp");
  }
  setreuid(1077, 44);
}

void chroot_safe4(){
  chdir("/tmp");
  if (chroot("/tmp") != 0) {
    perror("chroot /tmp");
  }
  seteuid(1077);
}


int main(void) {
  chroot_safe1();
  chroot_safe2();
  chroot_safe3();
  chroot_safe4();
}

     
